tokyomatik Posted February 8, 2006 Report Share Posted February 8, 2006 ok guys, finally my sid is making some noiseand i like it, but after the interconnection test i tried to check also the output with the oscilloscope just to see waveformand i noticed that there is a small tension of 1v coming out of it....is it a problem? Quote Link to comment Share on other sites More sharing options...
Jaicen Posted February 8, 2006 Report Share Posted February 8, 2006 Make sure there's a DC blocking cap on the output. You shouldn't have DC on the voltage output, that can misbias the input stage of whatever you're plugging into. Quote Link to comment Share on other sites More sharing options...
tokyomatik Posted February 9, 2006 Author Report Share Posted February 9, 2006 do you mean the 10 microfarad electrolithic cap?maybe the one that i soldered is not working....i also noticed that if you touch the ground of the audio output for a while, suddenly the audio signal disappear and to have it backi have to switch off the sidif the problem can be solved changing that cap, i'll do itlet me knowthanx Quote Link to comment Share on other sites More sharing options...
ImAlive Posted February 10, 2006 Report Share Posted February 10, 2006 You should propably not use any electrolytic caps in AC situations, the can "take" only 1 polarity and may get damaged or even explode if voltage is applied in the wrong way. A ceramic cap in series (parallel wiring might give you plenty of DC and be pretty pointless - Lowpass) with the signal line should block DC good enough. If touching the ground changes stuff, something else might be touching the ground when it shouldn't, so check for shorts.When checking with an osc., be sure to have DC adjusted to zero before checking, and that all grounds are wired properly. Quote Link to comment Share on other sites More sharing options...
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